Supercharged NSX

[AR]

Just wondering if any fellow board members had superchaged an NSX, and if so who did it for you.

The Comptech kit looks like a nice X - mas present.

Cheers

AR

[tommy]

janspeed at salisbury quoted me around ten grand to do mine, but i would only gain about 20% more power. i dont think its worth it somehow.

[ctrlaltdelboy]

spend some time browsing this section over at Prime - there's loads of experienced FI gurus who hang out there, plus loads of projects, installs, pics, ideas, recommendations, warnings etc etc.

[Kevin]

Superchargers are great but....

It seems the problem with all FI systems is long term effects on the engine, and track use. You will notice that the cars that have turbos the owners use them on drag strips, and dynos. I've been told the difficulty is getting enough fuel in over extended periods of time like track use.

You may or may not of course be interested in track driving.

The only supercharged car I know personally is Gerard's in Holland. He races his car. It, and so do the others, require a lot of tinkering and tweaking to keep running well.

I would rather perform an engine rebuild, with new pistons, bored out block and new cams than use FI. There are some new parts out now which enable this, while a couple of years ago the only way to go was FI.

[AR]

On that subject, are there any NSX tuners in the UK ?

[710]

More power, no supercharging? If I ever have to rebuild my NSX engine, I will take the following route. The only problem is, my car is still nice, and doesn’t need a rebuild. It feels like it will go another 100,000!
The compression ratio is really low on the NSX and I get the feeling the cam (the higher rev cam) profile can be a lot more aggressive. So if I rebuild an engine, I would do the pistons (got to do the rods too), cams and ECU (I imagine a new ECU map would probably be necessary).
I looked at Accralite pistons (pretty cheap about £200 for one-offs) and beautiful Farndon H-rods (about £250 each for one offs) because with the new pistons I probably wouldn’t be able to use the stock Honda rods. I hear they are connected to the pistons permanently. Anyway, with one off pistons, they might be able to match the stock rods, don’t know yet). And if I can find standard Farndon rods, the price goes down to £170 each.
I suppose Kent or Piper can regrind a more aggressive cam profile. With 11.1:1 compression (instead of the very low 10:1 compression made for the American market), better cam profile, you would be able to burn much more fuel. There are many ECU makers at the moment (about £500 to £1000) and mapping it would be easy to do too. All this has been advancing rapidly in the last years and in the UK is very easy. I would certainly try to use the same manifold and sensor locations.
I would expect about 350hp minimum (just raising the compression ratio increases the power a lot, plus with the new cam profile…). Is it possible the power would be more? I don’t know. Maybe.
The flywheel weighs a ton, I have lightened many flywheels on all sorts of cars, and it only improves things, with no drawbacks.
I would then have a normally aspirated engine, it would look normal, be cheaper than if I had replaced pistons and rods etc with Honda stuff, and would have proper power. Is the basic engine/clutch strong enough for 350hp? I would expect so. Anyway, it would cost less than the supercharger set up and it would be a “drive and forget” engine, not tricky to maintain.
I would really like to do this sometime, does anyone have a spare engine?
Peter

[710]

By the way, I need a '91-'94 NSX RHD steering rack. Complete less tie rods and rod ends. Doesn’t matter if it’s a little damaged or worn. Does anyone have one?
Peter

[Kevin]

Is it worth getting someone to do a cam regrind, rather than using some that are in production in the States already? Same goes for the pistons etc.

Who's up for contacting Jenvey Dynamics for some ITBs?

[710]

Good idea. Does someone there already build a normal compression (normal for us, high compression for them) engine. And if so, how much power does it bring?

[Kevin]

Both Dali and SoS are showing engine rebuild packages. I don't know who is doing the work for them. However these people http://www.kingmotorsports.com look like they do engines (possibly).